Covering for boilers



(No Model.)

G. B. BOARDMAN. GOVERING FOR BOILERS.

No. 402,798. Patented May 7, 1889.

Ej Z.

UNITED TATES eArnim? OFFICE.A

GEORGE B. BOARDMAN, OF CHICAGO, ILLINOIS.

COVERING FOR BOILERS.

SPECIFICATION forming part of Letters Patent No.l 402,798, dated May 7, 1889.

Application filed January 15,1889. Serial No. 296,443. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE B. BOARDMAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Non-Conducting Coverings for Boilers, Pipes, &c., of which the following is a specification.

My invention relates to an improved construction of the covering used for steam boilers, pipes, and other heated surfaces, to prevent the loss therefrom of heat by radiation, and for protecting gas and liquid pipes and the like from cold.

So far as I am aware, generally speaking, the various coverings hitherto invented for the same purpose as my improvement, when once applied to the surfaces they are designed to protect, cannot be readily removed nor without injuring them.

One of the more important objects of my improved construction of covering is to permit ready application thereof to its purpose, and as ready removal without thereby affecting it injuriously.

My invention is particularly designed to afford an improvement upon a construction of boiler and pipe covering at present in use, wherein sections or boxes formed of asbestus paper are filled with mineral wool and applied to the surface to be covered, being cemented together by means, ordinarily, of silicate of soda, the covering to protect it against injury being shielded while in use by windin g canvas or the like around it, or, as in the case of locomotive-boilers, by incasing it in ashield of sheet metal. lVhile this construetion of covering affords many advantages, the filling of mineral Wool, which is a somewhat fluffy material, tends to settle and pack particularly by the jarring of machinery on or near which the covering is applied, and thus undesirable spaces are produced in the filling, and the covering cannot, readily at least, be removed without injuring or destroying the asbestus paper. In this connection my object is to provide a construction of covering formed with mineral wool or analogous substance non-conductive of heat or cold and liable to settle, whereby no settling or packing of the material in use shall take place, and which can be removed and reapplied as often as desired without injuring it.

To these ends my invention consists in a covering for steam boilers, pipes, and the like, comprising a sheet formed of a woven-Wire back having the nonconducting material upon it and secured in place by strands of the wire; and it further cons ists in details of construction and combinations of parts.

In the accompanying drawings, Figure l is a plan view of a strip of my improved covering, showing at the ends thereof the woven wire upon and by which it is secured; and Fig. 2 is a section taken on the line 2 2 of Fig. l, and viewed in the direction of the arrows.

A denotes a sheet of my improved covering,

which comprises a back, B, of Woven wire,-

liaving secured to it afacing of material nonconductive of heat, preferably mineral Wool C. I prefer, though it is not necessary to do so, to secure the material C to the back in the Weaving of the latter, when it is desirable to apply the material in oblong rectangular, or substantially rectangular, sections r, of a length corresponding more or less accurately with the width of the wire sheet being woven, and to secure each section in place by passing over it at desired intervals across the' imposed adjacent to the first, the latter bein first withdrawn, which operations are repeated until the entire length of a sheet of myim proved material has been produced. Of 9 5 course, however, the construction may be otherwise produced, as by stitching warp-wires by hand through the superimposed non-conducting material, which also, instead of being `imposed in sections, may constitute a con- IOO tinuous layer. The construction described as it is illustrated, however, is preferred as affording the greatest advantages.

The ends ol the warp-wires, which are purposely intended to extend beyond the extremities of the superimposed non-conduct ing material, serve by twisting them together from the ends Which are brought adjacent to each other in covering a surface to fasten the ends of the sheet together; and While this means of fastening affords perfect security it is readily manipulated to unfasten and re fasten it as often as desired for removing and replacing the covering Without injury to the latter.

Obviously, instead of using the Warp-wires Iw for securing the material C in place, the Woof-wires yw could be employed for the purpose. l

The construction. renders the material C practically integral with its sustaining me dium l, and thus prevents any possibility of its settling and becoming packed in use.

that l claim as new, and desire to secure by Letters latent, is

l. A covering for steam boilers, pipes, and the like, cmnprising a sheet, A, formed of a woven-wire back having non-conduci'ing material secured upon it by strands of the sheet of woven Wire, substantially as described.

2. A covering for steam boilers, pipes, and the like, comprising a sheet, A, formed of a WovenWire back having non-conducting material secured upon it by strands of the sheet of Woven Wire, and the ends of strands extending at opposite extremities of the sheet beyond the superimposed non-conductive material and aii'ording fastening means, substantially as described.

A covering for steam boilers, pipes, and the like, comprising a sheet, A, formed of a Woven-Wire back, B, having mineral Wool, C, secured upon it by strands of the woven wire forming the back, substantially as described.

4L. A covering for steam boilers, pipes, and the like, comprising a sheet, A, formed of a Wovcn-Wire back, B, having sections fr ol mineral Wool, C, secured upon it by stramls ol' the woven wire forming the back, substantially as described. 

